等离子体电离态分布是等离子体物理学中被广泛应用的重要物理量之一,而原子数据是电离态计算的前提.首先,利用Rubiano相对论性原子结构模型、Faussurier非相对论原子结构模型和高度简化的More模型,分别计算各种电离度的Fe离子能量.通过与自洽场结果的比较后认为,Faussurier模型给出的原子数据比较精确可靠.然后,再利用以上模型研究了局部热力学平衡Fe等离子体电离态随温度和密度的变化情况.计算结果表明,不同原子模型提供的原子数据对平均电离度的计算结果影响不大,但明显地影响等离子体中的离子丰度.本文对这些差异进行了物理分析.

Ionization state distribution is one of the widely used physical quantities in plasma physics, whereas atomic data are the precondition for the evaluations. Firstly, Rubiano's relativistic atomic model, Faussurier's non-relativistic atomic model and More's highly simplified atomic model are utilized to calculate energies of multiply-ionized species for Fe element. The comparisons with the results by corrected Hartree-Fock calculations show that the data obtained by Faussurier's atomic model are the most reliable and accurate among them. Secondly, the variations of average ionization states and ion abundances for LTE Fe-plasmas with temperature and density are studied based on the atomic data from above models. Numerical values show that these data from different models exert a little influence upon average ionization states, but can affect remarkably the ion abundance in plasmas. Finally, the mechanism for this kind of distinction is physically elucidated.作者简介：郭永辉.E-mail: gyh661012@163.com.通讯作者